GRAUPNER SKY HERO III Instructions De Montage page 31

file back the excess screw length flush with the spreader plate.
To obtain proper clearance, the elevator horn must be bevelled slightly as shown in
the photo. Attach it to the elevator as described above.
Installing the servos in the fuselage
Press the rubber grommets (supplied with the servos) into the servo mounting lugs.
Push the brass tubular rivets into the rubber grommets from the underside, so that
the flange is at the bottom. You may find it easier to insert the tubular rivets if you fit
them on a small screwdriver first. Place the servos in the servo plate in the fuselage,
drill 1.5 mm Ø pilot-holes and secure them using the screws supplied with the servos.
Screw clevises onto the front end of the rudder and elevator pushrods. Cut down the
cruciform servo output devices as shown in the photo. The clevises on the rudder
and elevator pushrods should be connected to the outer linkage holes in the servo
output arms (lever length 13 mm). Drill out the inner linkage hole for the steerable
nosewheel using a 2 mm Ø bit. Mount the pushrod connector on the output arm and
check that it rotates smoothly, but without slop.
Swivel pushrod connector mounting
Set both servos to centre from the transmitter, then fit the output arms on them.
Check that the steerable noseleg pushrod fits through the cross-hole in the pushrod
connector. The M3 grubscrew in the swivel connector should be secured with a drop
of thread-lock fluid.
Installing the switch in the fuselage
The switch should be mounted in the left-hand fuselage side in a position such as
that shown in the picture. Cut a rectangular hole in the fuselage side to suit the
switch, install the unit and fit the retaining screws. If you are using woodscrews, glue
small pieces of plywood or spruce strip on the inside of the fuselage to prevent the
screws working loose.
Installing the undercarriage
You will find a channel on the underside of the fuselage which accepts the
undercarriage. Locate it using your fingers (as described for the tailplane and fin
slots) and melt away the film using a soldering iron. Fit the undercarriage units in the
channel, and position the saddle clamps over them. Drill pilot-holes for the retaining
screws and fit the screws to secure the undercarriage.
Fit the wheels on the main axles, and secure each with two collets. The outer collet
should be fitted flush with the end of the axle.
Installing the noseleg unit
The noseleg and steering arm are installed together: connect the pre-formed end of
the steering pushrod to the noseleg steering arm, then slip the pushrod into the guide
tube. The inboard end fits through the cross-hole in the swivel connector on the
rudder servo output arm. Install the noseleg unit as shown in the photo. Tighten the
clamping screw in the steering arm, taking care to engage the screw on the
machined flat in the wire.
GRAUPNER GmbH & Co. KG D-73230 KIRCHHEIM/TECK GERMANY
Änderungen vorbehalten! Keine Haftung für Druckfehler! 02/2009 Made in Vietnam
31